In our '95 855, the glove box light caused a drain even after I removed the bulb.

I had to remove the switch and bulb holder to stop the draw.

When you pulled the fuses, did you check for current across the fuse terminals?

When checking for stray currents, I do not trust digital meters that auto range - I purchased a good analog meter on eBay for any fine work.

For careful analog work, you must position the meter so that it yields a true zero, as gravity affects the movement when using fine scales.